Facsimile transmission method and system

Details Facsimile transmission method and system Facsimile transmission method and system

1975-03-12

1976-12-28

Robinson, Thomas A.

Telegraphy

Systems

Printing

178 3, 178 26R, 179 4, 340147R, H04Q 500, H04M 1106

Patent

active

040003710

ABSTRACT:
Two facsimile devices, each capable of operating in a plurality of communication modes and having at least one common communication mode are connected together by a telephone line. One of the devices sends to the other a plurality of low and high group frequency signals arranged in a code designating the possible communication modes of the device. The other device receives the signals, determines from them a common communication mode based on its own possible communication modes in accordance with a priority arrangement, and sends high and low group frequency signals to the first device indicating the selected common communication mode so that both of the facsimile devices are set to the selected common communication mode prior to the transmission of graphic information.

REFERENCES:
patent: 3384713 (1968-05-01), Duncan
patent: 3457550 (1969-07-01), Gibson et al.
patent: 3609241 (1971-09-01), Riethmeier
patent: 3739338 (1973-06-01), Jacobson et al.

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